Realm: Terrestrial
Climate: Tropical
Biome: Tropical and subtropical dry broadleaf forests
Central latitude: 18.190000
Central longitude: -65.430000
Duration: 18 years, from 1991 to 2008

1171 records

31 distinct species

Across the time series Coereba flaveola is the most frequently occurring species

Methods

Measurements of bird abundance are taken in the 9 ha grid (5/89 to 6/90) and Luquillolterdb23-Bird point counts Forest Dynamics Plot (10/90 to present) at El Verde and in Watershed 1 and Whendee Silver's cut plots at Bisley.DATA SET METHODSCircular plot counts are used to measure relative numbers of birds over time and betweensites. The duration of each count is 10 minutes. During this period. all birds heard or seen are recorded on a data sheetin one of two categories: 1) within 25 m of the observer (< 25 m) and 2) further than 25m from the observer (> 25 m).Records are further broken down into birds only heard (H on the data sheet) and birds observed (recorded as estimateddistance from the sampling point in meters; see sample data sheet).Counts are begun as soon after dawn as possible and conclude before noon. Census points are at least 60 m apartwithin the grids. A complete list of the grid points where counts are taken is found in the data. Originally counts wereconducted three times a year. Unit of abundance = IndCountInt, Unit of biomass = NA

Citation(s)

Waide, R. B. (2010) “Bird abundance - point counts”. Long Term Ecological Research Network. Available at: http://dx.doi.org/10.6073/pasta/0d96957379936a038ebbbcc6135b2fab, accessed 2012.
Waide, R. B. "Bird abundance - point counts, El Verde Field Station, Puerto Rico: Luquillo Long Term Ecological Research Site Database: Data Set 23". Available at: http:/luq.lternet.edu/data/luqmetadata23, accessed 2012.